Concept Development: Evolution is the “change in an animal species over time.” A scientist named Charles Darwin believed what drove evolution is “natural selection.” Natural selection is a process where individuals with traits that are better suited to the environment in which they live, are more likely to survive longer and reproduce. In the video Molluscs: The Survival Game, you will see that molluscs have “descended with modification” to create a very diverse group of modern species. The basic parts of the molluscan body plan, the shell, the foot, the radula, the mantle, have all been adapted over millions of years to serve many different functions. The need to obtain food and avoid predation has driven this diversity.
Videos to use with this lesson plan: